/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.explorer.ui.management.processdefinition;

import com.vaadin.data.Item;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.explorer.data.AbstractLazyLoadingQuery;

import java.util.ArrayList;
import java.util.List;


/**
 * @author Joram Barrez
 */
public class ActiveProcessDefinitionListQuery extends AbstractLazyLoadingQuery {

    protected transient RepositoryService repositoryService;

    public ActiveProcessDefinitionListQuery() {
        this.repositoryService = ProcessEngines.getDefaultProcessEngine().getRepositoryService();
    }

    public int size() {
        return (int) repositoryService.createProcessDefinitionQuery().active().count();
    }

    public List<Item> loadItems(int start, int count) {
        List<ProcessDefinition> processDefinitions = repositoryService.createProcessDefinitionQuery()
                .active()
                .orderByProcessDefinitionName().asc()
                .orderByProcessDefinitionVersion().asc()
                .listPage(start, count);

        List<Item> processDefinitionItems = new ArrayList<Item>();
        for (ProcessDefinition processDefinition : processDefinitions) {
            processDefinitionItems.add(new ProcessDefinitionListItem(processDefinition));
        }

        return processDefinitionItems;
    }

    public Item loadSingleResult(String id) {
        return new ProcessDefinitionListItem(repositoryService.createProcessDefinitionQuery()
                .processDefinitionId(id).singleResult());
    }

    public void setSorting(Object[] propertyIds, boolean[] ascending) {
        throw new UnsupportedOperationException();
    }

}
